Go to a top level page (collection). In this case it's a blog

Have the inspector open. Make sure you're showing it on the Menu, by clicking the second tab on the inspector and having Include page in: Menu as checked

To create subpages with dropdown menu links, you need to add these pages to the menu list

  1. Click on the first subpage
  2. Open the inspector and click on the second (page) tab
  3. You will need to click on the Include page in: Menu as: checkbox.
  4. You may rename the page if necessary

If you've done this succesfully...

You'll see the menu item appear as shown

Do this for all your submenu pages

And you'll see them all move. If some menu items are further nested, you can create multilevel menus. But in general, don't.

Do this for all your submenu pages